<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录界面</title>
</head>
<body>
    <form method="post">
        用户名<input name="username"><br>
        密码<input name="password" type="password"><br>
        <input value="登录" type="submit">
    </form>
    {% if msg%}
        <p>{{ msg }}</p>
    {% endif %}
</body>
</html>